• New Variable-Energy Electron Ionisation Technology Launched  

Mass Spectrometry & Spectroscopy

New Variable-Energy Electron Ionisation Technology Launched  

Mar 26 2014

Markes International has announced the launch of a variable-energy electron ionisation source technology for GC–MS, Select-eV®.

By enabling the energy of ionising electrons to be changed, Select-eV breaks new ground in the field of GC–MS. It allows the production of reference-quality electron ionisation mass spectra with conventional full-fragmentation patterns, and repeatable ‘soft-ionisation’ spectra exhibiting reduced fragmentation and an enhanced molecular ion.

Previous attempts to develop soft electron ionisation have been compromised by a dramatic drop in sensitivity. Other approaches to soft ionisation have also been limited by the inconvenience of reagent gases or source exchange. Select-eV overcomes all these problems by maintaining or enhancing sensitivity, without the need to reconfigure the system or add reagents.

Nick Bukowski, Mass Spectrometry Business Unit Manager at Markes, said “Using Select-eV, the desired ionisation energy is simply selected as part of the method setup in the controlling software. Energies can be varied anywhere from standard 70 eV down to 10 eV. The molecular ion is enhanced at lower energies but a degree of structurally significant fragmentation is also maintained. This makes Select-eV perfect for any GC–MS analyst needing further confirmation of compound identity, or wanting to distinguish between compounds with spectra that are very similar at 70 eV.”

Bukowski added “Lowering the energy of electron ionisation usually causes a dramatic drop in sensitivity, but Select-eV overcomes this problem. In fact, the signal-to-noise ratios of many compounds are increased at lower energies. This is a crucial advantage of Select-eV for trace analysis and for challenging samples such as the complex mixtures of hydrocarbons routinely investigated in the petrochemical industry.”

Select-eV is available with the BenchTOF range of time-of-flight mass spectrometers from Markes International, which enjoy increasing popularity in the GC–MS field for their high degree of sensitivity and the production of ‘reference-quality’ spectra, alongside numerous productivity advantages for the analyst.

Markes is launching Select-eV and the newly updated BenchTOF line of mass spectrometers at the HTC-13 conference in Bruges, Belgium, from January 28. The company will also be presenting their world-leading range of innovative thermal desorption technology for automated extraction/concentration of trace organics in air and materials.
 


Digital Edition

Lab Asia 29.4 - August 2022

August 2022

In This Edition Chromatography - Automated Sample Preparation:The Missing Hyphen to Hypernation - New Low Volume Air Sampler for PFAS Analysis - Analytical Intelligence Starts with the Samp...

View all digital editions

Events

ACS National Meeting & Expo, Fall 2022

Aug 21 2022 Chicago, IL, USA & Online

ACHEMA 2022 - NEW DATES

Aug 22 2022 Frankfurt, Germany

IMSC 2022

Aug 27 2022 Maastricht, Netherlands

EuCheMS Chemistry Congress

Aug 28 2022 Lisbon, Portugal

Medical Fair Asia 2022

Aug 31 2022 Singapore

View all events